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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Kress Municipal Water System

MTBE was used as gasoline oxygenation additive to boost the octane number. In 2005, MTBE was replaced by ethanol as a gasoline additive. MTBE causes cancers in rats.

MORE ABOUT THIS CONTAMINANT

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.545 ppb62ND - 1.84 ppb
20150.138 ppb51ND - 0.690 ppb
2016ND50ND
2017ND50ND
20180.640 ppb53ND - 1.44 ppb
20190.694 ppb52ND - 1.76 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 13 ppb

The EWG Health Guideline of 13 ppb for MTBE was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-18Q1405059009ND
2014-02-18Q1405059006ND
2014-03-31Q14100630011.84 ppb
2014-04-24Q14131650061.43 ppb
2014-08-07Q1434597001ND
2014-11-12Q1455719002ND
2015-03-18Q1510073012ND
2015-03-18Q1510073010ND
2015-06-09Q1521104003ND
2015-09-30Q1538513001ND
2015-11-19Q15461190020.690 ppb
2016-02-17Q1607066001ND
2016-02-17Q1607066009ND
2016-05-04Q1617546002ND
2016-09-26Q1639970002ND
2016-10-19Q1644600001ND
2017-01-19Q1702736001ND
2017-04-10Q1714726002ND
2017-07-13Q1728904002ND
2017-07-13Q1728904005ND
2017-11-14Q1758297001ND
2018-01-18Q1802138001ND
2018-05-17Q18202990030.940 ppb
2018-05-17Q1820299002ND
2018-08-01Q18305680010.820 ppb
2018-10-09Q18401250011.44 ppb
2019-01-24Q19035710031.76 ppb
2019-04-09Q1914247003ND
2019-04-09Q1914247002ND
2019-07-09Q19427240021.71 ppb
2019-10-29Q1974402001ND